// Copyright 2012 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#if V8_TARGET_ARCH_IA32

#include "src/debug/debug.h"

#include "src/debug/liveedit.h"
#include "src/frames-inl.h"
#include "src/macro-assembler.h"

namespace v8 {
namespace internal {

#define __ ACCESS_MASM(masm)

    void DebugCodegen::GenerateHandleDebuggerStatement(MacroAssembler* masm)
    {
        {
            FrameScope scope(masm, StackFrame::INTERNAL);
            __ CallRuntime(Runtime::kHandleDebuggerStatement, 0);
        }
        __ MaybeDropFrames();

        // Return to caller.
        __ ret(0);
    }

    void DebugCodegen::GenerateFrameDropperTrampoline(MacroAssembler* masm)
    {
        // Frame is being dropped:
        // - Drop to the target frame specified by eax.
        // - Look up current function on the frame.
        // - Leave the frame.
        // - Restart the frame by calling the function.
        __ mov(ebp, eax);
        __ mov(edi, Operand(ebp, JavaScriptFrameConstants::kFunctionOffset));
        __ leave();

        __ mov(eax, FieldOperand(edi, JSFunction::kSharedFunctionInfoOffset));
        __ movzx_w(
            eax, FieldOperand(eax, SharedFunctionInfo::kFormalParameterCountOffset));

        // The expected and actual argument counts don't matter as long as they match
        // and we don't enter the ArgumentsAdaptorTrampoline.
        ParameterCount dummy(0);
        __ mov(esi, FieldOperand(edi, JSFunction::kContextOffset));
        __ InvokeFunctionCode(edi, no_reg, dummy, dummy, JUMP_FUNCTION);
    }

    const bool LiveEdit::kFrameDropperSupported = true;

#undef __

} // namespace internal
} // namespace v8

#endif // V8_TARGET_ARCH_IA32
